BMW Z4 Coilover Suspension Kit – Front + Rear – AST 5100 Series, 1‑Way Adjustable Monotube (Rebound & Ride Height) – 2018–2027. A true coilover for the G29, built for daily driving and precise control.

Developed by AST, the 5100 uses a high‑pressure monotube with a large piston for consistent, responsive damping. Front and rear are true coilovers with springs, built to use OEM top mounts. A single rebound adjuster gives 12 clicks to tune return‑to‑extension and road balance as you set ride height. Reduced aeration helps keep feedback predictable, and the dampers are rebuildable.

Features

• 1‑way: 12‑click rebound + ride height
• High‑pressure monotube, large piston
• True coilover front and rear
• Includes springs; uses OEM top mounts
• Rebuildable/serviceable

Questions or planning a build? Call Texas 512-982-9393 or California 562-981-6800. Our Austin, TX and Los Angeles, CA area shops offer installation and customization. Buying multiple items? Ask about shipping discounts. We install on premises at both locations.

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